Hydroxydialkylaminoalkylaminoisoquinolines and related compounds



Unit-(id States tent 3 101 33s HYnnoxYnmrxrrjAMiNoALnYLAMmorso oonsornvns AND RELATED COMPOUNDS Richard A. Robinson, Evanston, 111., assignor to G. D.

Searle & Co., Chicago, 111., a corporation of Delaware N Drawing. FiledSept. 6, 1962, Ser. No. 221,896 12 Claims. (Cl. 260-268) The present invention relates to a group of hydroxysubstituted dialkyl'aminoalkylarninoisoquinolines and hydroxy-sulbsti'tuted (cyclic -amino)alkylarninoisoqu1nol1nes;

More particularly the present .invention relates to com:

pounds having the following formula QNH--Alk-NRR' i wherein Qis selected from the group consisting of iso-' hydroxyflower alkyl) hydroxy (lower alkyl)- and hyd 0xy(lo e a'llryl) N l N l l' W I w The lower alkyl radicals referred to above contain up to 6 carbon atoms and are exemplified by radicals such as methyl, ethyl, propyl, isopropyl, and butyl. Likewise, the hydroxyflower alkyl) radicals referred to above contain up to 6 carbon atoms and are exemplified radicals such as hydroxymethyl, Z-hydroxyethyl, 3- hydroxypropyl,

Patented Aug. 20, 1963 sulfite, in a Bucherer type reaction. 'Ilhe reaction is carried out at a temperature of about 100-2'00 C. The compounds of this; invention posses valuable pharmaoologicalproperties. Thus, they possess useful antiinllammatory activity as is demonstrated by their phenylbutazone-like elfect on edematous conditions and their low toxicity. 7 g The present compounds also are inhibitors of seed :gerrnination as is demonstrated by their inhibition of germination of seed of Trifolium. Furthermore, they also pos sess antibacterial activity. More specifically, they inhibit the growth of Diplococcuspneumoniae In addition, those compounds in which *NRR is a hydroxy-substituted cyclic amino group also inhibit the growth of Chlorella vulgaris.

Equivalent for the purposes of this invention are the a'cid addition salts which the compounds or the present invention form with a variety of organic and inorganic acids. Salts of this type are formed with acids such as sulfuric phosphoric, hydrobrorm'c, hydrochloric, oxalic, citric, maleic, and related acids. They also form quaternary ammonium salts with a variety of organic esters of hydrohalic and aromatic sulfoni c acids. 1 Among the esters; useful for this purpose are methyl chloride, bromide and I and ethylene chlorohydrin.

iodide, ethyl chloride, propylehloride, dimethyl su-lfiate,

, The compounds which oonstitute this'invention and their preparation will appear more fully from a'corisideration of the following examples, which are given forthe purpose of illustration only and are not to be construed as limiting the invention in spirit or scope. In. these exam- I 'ples, quantities are given in parts by weight, temperatures and Z-hydroxypropyl. Alk in the above formula separates s the nitrogen atoms by at least 2 carbon atoms and thus' is exemplified by ethylene, trimethylene, propylenetetra methylene, 1,2 butylene, and pentamethylene.

Halogen or hydroxy substituted isoquinolines can serve as the starting materials for preparing the compounds of the present invention. In particular, the l-substituted isoquinolines of the present invention can' be prepared by reacting a l-haloisoquinoline,preferably lchloroisoquL noline, with an amine of the formula wherein Alk and NRR' have the values indicated above.

If a polyhalogenated isoquinoline such as L'Z-dichlloroiso. quinoline is reacted'with an amine, the corresponding 1'- aminoisoquinoline is obtained.

'I hose'compounds wherein the amino group is located at positions other than thel-polsition of the isoquinoline nucleus can be prepared by reacting the appropriate amine with an appropriate hydroxyisoquinoline and sulfur dioxide or a sulfite, such as ammonium sulfite and sodiumbiin degrees centigrade C.)', and pressures in millimeters of mercury (mm) H Example 1 A mixture of 26 parts of .l-piperazineethanol and 12 parts of acrylonitrile is heated at about 110420 C. for 3-0 minutes. Low boiling material is distilled from the re.

7 action mixture to leave a residue of crude 4-(2'- cyanoethyl)-1-piperazineethanol. 1825 parts of this crude alcohol, 5 parts of Raney nickel catalyst and 0.5 part of plat inum oxide are added to a mixture of lopar'ts of liquid ammonia in 200 parts or methanol. The resultant ture is hydrogenated at room temperamre at a pres ure of 2-3 atmospheres. When the reduction is complete, the

' catalyst is removed" by filtration and the solvent is removed by distillation at atmospheric pressure. The residue is then distilled at reduced pressure togive meantimpropyD-l-piperazineethanol boiling at about 102-105 C. at 0.01 mm. pressure. I

If equivalent quantities of the appropriate starting material are used and the above procedure is repeated, thefolllowing compounds are obtained.

2-[N- (3-aminopropyl)ethylaminokthanol I boiling at.

about 112 C. at 0.6 mm. pressure.

2-[N-'(3-aminopropyl)methylarnino]ethanol boiling at about 121 c. at 0.2. mm pissine.

' A 1-'(3-aminopropyll Z-PyrroIidineme'tHanol.

:11e(3 aminopropyl) 3-pyrrolidinol. l

1*(3 4anfinopropyl)-3-pipeiidiit0gl boiling at about 87; 89 Cxat 0.01 mm. pressure. 1 u 1-(3+aminopropyl).-4-piperidinol boiling at about '95 C. at 0.01 mm.'pressure.

. 1-( 3'aminopropyl) 4 piperidinemethanol boiling at about C. at 0.03 mm. pressure.

1- 3-amin0pr0pyl -4-piperidineethanol. 4-( 3-aminopropyl) -1-piperazinebutanol.

Example 2 v A mixture of 74 parts of.t2-[N (3=amihopropyl)ethylamino1ethan'ol, 12 parts of sulfur dioxide, parts of water, and 25 parts of S-hydroxyisoquinoline is refluxed for 130 hours. The resultant mixture is cooled and diluted with 200 parts of water. This mixture is extracted with portions of a benzene ether mixture, each portion consisting of 200 parts of a mixture of equal parts by volume of benzene and ether; The combined extracts are washed 'with diluted sodium hydroxide solution and then with Water and dried. The dried mixture is distilled at atmospheric pressure to remove the solvent and distillation is continued under reduced pressure to give 5-{3- [N- (Z-hydroxyethyl)ethylarninolpropylamino} isoquinoliue distilling at about 200-210 C. at 0.01 mm. pressure.

Oxalic acid is added to an ether solution of the distilled amine to give the corresponding sesquioxalate. This salt is purified by recrystallization from a mixture of methanol and ether. It melts atabout 195 C. The free base has the following formula GH2CH3 l 'IHCH2OHaCHzN CH2CH2OH Example 3 CHzGHnOH Example 4 If an equivalent quantity of 2- [N-(Z-aminoethyDethyI- amino]ethanol is substituted for the 2-[N-(3-aminopropyl)ethylamino] ethanol and the procedure of Example 2 .is repeated, the product is 5-{2-[N-(2-hydroxyethyl)- ethylamino] ethylamino}isoquinoline.

Likewise, 2-[N(5-aminopentyl)ethylamino] ethanol reacts with S-hydroxyisoquinoline to give S-{S-[N-(Z-hydroxyethyl) ethylamino] pentylamino}isoquinoline. This compound has the following formula CH2C a CHzCHzOH Example 5 Example 6 A mixture of 30 parts of 2-[N-(3-aminopropyl)ethylamino]ethanol and 17 parts of l-chloroisoquinoline is slowly heated to 180 C. cover a period of 20 minutes. Heating is continued at 180-190 C. for an additional 45 minutes. a The resultant mixture is cooled and made slightly alkaline with dilute sodium hydroxide solution. The aqueous mixture is extracted with 5 portions of benzene-ether mixture (equal parts by volume) and the combined extracts are washed with water. The dried solution is distilled first at room temperature to remove the solvent and then at reduced pressure to give 1-{3-[N-(2- hydroxyethyl)ethlamino]propylamino}isoquinoline di 5- tilling at about 180 C. at 0.01 mm. pressure. The free amine is dissolved in 2-propanol and mixed with a 2-propanol solution of oxalic acid to give the salt of the above 25 parts of 8-hydroxyisoquinoline, 74 parts of 2- [-N-(3- ing formula I oHzoHa NHCHzCHgCHgN omomon -perature for about 30 minutes.

isoquinoline compound with 2 moles of oxalic acid. This dioxalate melts at about 9l-93 C. The free amine has the following formula CHaCHa Example. 7

7 parts of S-methoxy 1 chloroisoquinoline is mixed with 10 parts of Z-[N (3 aminopropyl)ethylamino]- ethanol and gradually heated to a temperature of C. The reaction mixture is maintained at this tem- The product is then isolated from the reaction mixture according to the procedure described in Example 6. The free amine is converted to the oxalate and the crude salt is recrystallized from ethanol to give 1-{3-[N-(2-hydroxyethyl) ethylamino1propylamino} 5 methoxyisoquinoline dioxalate melting at about 135 C. The free base of this compound has the following formula 0 H:

CHzOHs l NHCHgCEgCHzN C 2C aOH Example 8 93 parts of 4-(3-aminopropyl) 1 piperazineethanol, 14 parts of sulfur dioxide, 100 parts of water, and 22 parts of S-hydroxyisoquinoline are mixed and heated at reflux for 90 hours. The reaction mixture is cooled and diluted with 200 parts of water. The mixture is then extracted with 5 portions of chloroform and the combined chloroform extracts are washed with dilute sodium hydroxide solution and then with water. The

solution with excess sulfuric acid in 2-propanol.

I is repeated.

resultant solution is dried and then distilled to give {3-[4-(2-hydroxyethyl) 1 piperazinyl]propylamino}- isoquinoline boiling at about 210-220 C. at 0.01 mm. pressure. The free amine is dissolved in 2-propanol and converted to the corresponding disulfate by mixing the This disulfate melts at about 237-238 C. The free base has the following formula l vnomomom-n iv-omcmon" Example 81 parts of 4-(3-an1inopropyl) 1 piperazinebutanol, 14 parts of sulfur dioxide, 100 parts of water, and 22 parts of S-hydroxyisoquinoline are reacted according to the procedure described in Example 9. The product is 5-{3-[4-(4-hydroxybuty-l) 1 piperazinyl]propylamino}- isoquinoline. This compound has the following formula lIIHCHzCHzCHr-N N-CHBCH2CH2OH2OH Example 11 A mixture of '20 parts of S-hydroxyisoquinoline, 89 parts of l-(B-aminopropyl) 3 piperidinol, 100 parts of water, and 12 pants of sulfur dioxide is heated slowly to the boiling point and then refluxed for 72 hours. I The resultant mixture is cooled and extracted with 5 portions of a benzene-ether mixture (equal parts by volume). The combined extracts are washed first with sodium hydroxide solution and then with water and-dried. The solvent is distilled from the solution to give a crystalline residue which is 5-[3 (3 hydroxypiperidino)propylamino]isoquinoline melting at about 94-96" C. This compound has the following formula NHCHzCHzCHz-N OH I N Example 12 An equivalent quantity of the appropriate 1-(3-aminopropyl)amine is substituted for the 89 parts of 1(3-amino propyl)-3-piperidinol and the procedure of Example 11 In this way, 1(B-aminopropyl)-2-hydroxymethylpyrrolidine reacts with S-hydroxyisoquinoline to give 5-[3-(2-hydroxymethyl l pyrIolidinyDpropylarnino1isoquinoline, 1-(3-aminopropyl) 4 (2-hydroxyethyl)piperidine reacts with 5-hydroxyisoquinoline to give 5-{3- [4-(2 hydroxyethyl)piperidino]propylamino}-isoquinoline, and 4-hydroxymethylpiperidine reacts with 5- hydroxyisoquinoline to give 5-[3-(4-hydroxymethylpiperidino)propylaminoJisoquinoline. The last compound has the following formula nnomomom-Qcmon 6 Example 13 r If 81 parts-of 1-(3-arninopropyl) 3-pyrrolidinolis substituted for the 89-parts of 1-(3raminopnopyl)-3+piperidinol and the procedure of Example llis repeated, the product is 5- [3( 3-hydroxyl-pyrrolidinyl) propyl-amino] isoquinoline. This compound has the following'formula A mixture of 12 parts-of rl-chloroisoquinoline and 12 parts of l-(3-aminopropyl)-4-piperidinol is heated slowly to C. An exothermic reaction ensues and the temperature rises rapidly to about 200 C. The mixture is cooled to about 135-145 C.;and maintained at this temperature for 15 minutes. The reaction mixture is then cooled and made slightly alkaline by the addition of dilute sodium hydroxide solution. The aqueous mixture is thenextracted with 5 portionsiof a benzene-ether mixture (equal parts by volume) and the combined extracts are washed with dilute sodium hydroxide solution and then with water. Distillation of the organic solution at atmospheric pnessureremoves the solvent and then distillation at reduced pressure gives 1-[3-(4-hydroxypiperidino)propylaminlo]isoquinoline boiling at about 200- 2 10 C. at 0.01 mm. pressure. The --free amine is dissolved in 2-propanol and mixed with a solution of hydrogen chloride in 2-propanol to give the corresponding dihydrochloride melting at about 257 C. The free base has the following fiormu-la Example 16 When an equivalent quantity of l-(3-aminopropyl)-3- l NHCHzCHaCHa-OOHaOH Example 17 If an equivalent quantity of 4-'(3-aminopropyl)-1-piperazineethanol is substituted for the l-(aminopropyl)-4- 8 piperidinol and the procedure of Example 15 is repeated, 4. A compound of the formula the product obtained is 1-{3 [4-(2-hydroxyethyl)-1-piperazinyl]propylamino}isoqninoline. In this case the product is isolated as the free amine melting at about 9293 C. This compound has the following formula 5 N 0H i rncmc-mcm-n N 5. 1 [3 (3 hydroxypiperidino)propyl aminofiso quinoline. 1 IHOH2CH CH N 6. A compound of the formula What is claimed is: NH-CHzOHzCHz-N on 1. A compound of the formula I 40H.

Q-NHAllg-NRR wherein Q is selected from the group consisting of iso- N quinolyl, S-methoxy-l-isoquinolyl, and 7-chloro-1-isoquinolyl; All: is lower alkylene containing 2 to 5 carbon atoms; and 'NRR is selected from the group consisting of (lower alkyl) (hydroxy lower alkyl)amino, hydroxy (lower alkyhpiperazinyl,

wherein n is a positive integer less than 3.

7. 5 [3 (4 hydroxypiper-idlino)propylaminolisoquinoline."

8. A compound of the formula 1E[O- \N NHOHiGHzCHzN +(hydroxy lower alkyl) oH2).- I --(c112 n and hydroxyflower alkyl) N- (GHQDJ wherein n is a posltive integer less than 3. 9. A compound of the formula wherein n is a positive integer less than 3.

2. A compound of the formula NHCH2CHzCH2-N N-(hydroxy lower alkyl) I (lower alkyl) NH-Alk-N N OHzCHzQH 40 10. 5 {3 [4 (2 hydroxyethyl) 1 piperazinyl] N propylamino}=isoquinoline.

11. 1 {3 [4 (2 hydroxyethyl)-1-piperazinyl] wherein Alk is lower alkylene containing 2 to 5 carbon propylamnohsoqumolme' amoms 1 2. l {3 [N (2 hydroxyethyl)ethylamino1propyl- 3. 5 {3 [N (2 hydroxyethyl)ethylamino1propy1- amno}lsoqumohne' amino}isoquinoline. 7 No references cited. 

1. A COMPOUND OF THE FORMULA 